An Experimental Study on the Characteristics of Metal Temperature and Heat Rejection to Coolant of Gasoline Engine

가솔린엔진의 금속면온도 및 냉각수로의 전열 특성에 관한 실험적 연구

  • 오창석 (현대자동차 파워트레인연구소) ;
  • 유택용 (현대자동차 파워트레인연구소) ;
  • 신승용 (현대자동차 파워트레인연구소) ;
  • 최재권 (현대자동차 파워트레인연구소)
  • Published : 2001.05.01

Abstract

In recent applications, map controlled thermostat has been adapted to optimize engine cooling system and vehicle cooling system. First of all, this strategy is focused on improving fuel consumption rate and reducing emissions, especially unburned hydrocarbon. The object can be obtained through controlling engine metal temperature by varying engine coolant temperature with engine load and speed. To achieve this goal, it is necessary to understand the characteristics of engine metal temperature and heat rejection rate to coolant. From the results of tested engines, it is obvious that fuel consumption rate has more dominant effect on engine metal temperatures than the corresponding engine power does. Also, Re-Nu relation which shows heat rejection rate to coolant in function of air-fuel mixture and engine specifications has been studied. Also, the empirical Re-Nu relation at full loaded engine was developed.

Keywords

References

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